This already exists. There are two categories of systems: * with wristband (http://www.sealswimsafe.com/#!how-it-works/cok0 http://www.sealswimsafe.com/#!how-i

This already exists. There are two categories of systems: * with wristband (http://www.sealswimsafe.com/#!how-it-works/cok0 http://www.sealswimsafe.com/#!how-it-works/cok0) * with underwater camera (http://www.poseidonsaveslives.com/ http://www.poseidonsaveslives.com/ http://www.poolview.co.uk/swimeye/ http://www.poolview.co.uk/swimeye/ http://www.angeleye.it/ http://www.angeleye.it/)